package com.xyxy.web;

import com.xyxy.pojo.Book;
import com.xyxy.pojo.Page;
import com.xyxy.service.BookService;
import com.xyxy.service.impl.BookServiceImpl;
import com.xyxy.utils.WebUtils;

import javax.servlet.ServletException;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ClientBookServlet extends BaseServlet {

    BookService bookService = new BookServiceImpl();

    //处理分页
    protected void page(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //1,获取请求的参数pageNo和pageSize
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);

        //2,调用BookService.page(pageNo，pageSize)：Page对象
        Page<Book> page = bookService.page(pageNo,pageSize);

        //设置分页条的请求地址
        page.setUrl("client/bookServlet?action=page");

        //3,保存Page对象到Request域中
        req.setAttribute("page",page);

        //4,请求转发到/pages/client/index.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);

    }

    //处理通过价格搜索
    protected void pageByPrice(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //1,获取请求的参数pageNo和pageSize
        int pageNo = WebUtils.parseInt(req.getParameter("pageNo"),1);
        int pageSize = WebUtils.parseInt(req.getParameter("pageSize"), Page.PAGE_SIZE);
        int min = WebUtils.parseInt(req.getParameter("min"),0);
        int max = WebUtils.parseInt(req.getParameter("max"),Integer.MAX_VALUE);

        //2,调用BookService.page(pageNo，pageSize)：Page对象
        Page<Book> page = bookService.pageByPrice(pageNo,pageSize,min,max);

        //设置分页条的请求地址
        StringBuilder stringBuilder = new StringBuilder("client/bookServlet?action=pageByPrice");
        //如果有最小价格的参数，追加到分页条的地址参数中
        if(req.getParameter("min") != null){
            stringBuilder.append("&min=").append(req.getParameter("min"));
        }
        //如果有最大价格的参数，追加到分页条的地址参数中
        if(req.getParameter("max") != null){
            stringBuilder.append("&max=").append(req.getParameter("max"));
        }
        page.setUrl(stringBuilder.toString());
        //3,保存Page对象到Request域中
        req.setAttribute("page",page);

        //4,请求转发到/pages/client/index.jsp页面
        req.getRequestDispatcher("/pages/client/index.jsp").forward(req,resp);

    }
}
